Watermarking marking good mail as SPAM?

[Andreas Kasenides]

Hi everybody. MailScanner is a great community.

I am suspecting that the watermarking feature is making some messages
as spam when it should not. Here is part of a header from a message that 
was
marked as spam.

Subject:
Re: [Spam] TACAS09
............
Message-ID:<4ABB3634864C at mac.com>
In-reply-to:<1020801 at cs.ucy.ac.cy>
References:<3D1A89EADBC at mac.com> <48CC0FDE.1020801 at cs.ucy.ac.cy>
X-Mailer:Apple Mail (2.928.1)
X-CSatUCY-Information:Please contact xxxx at cs.ucy.ac.cy for help.
X-CSatUCY-MailScanner-ID:E7309
X-CSatUCY-VirusCheck:Found to be clean
X-CSatUCY-SpamCheck:not spam, SpamAssassin (score=-2.599, required 5, 
autolearn=not spam, BAYES_00 -2.60)
X-CSatUCY-From:yyyyy at mac.com
X-CSatUCY-Watermark:1221964537.75397 at fPhgdJd/cnrjJXq+MyJL2w
X-Spam-Status:No

If I read it correctly SA has not marked this as spam.
But yet the Subject was appended with [SPAM] (our spam signature).
Our watermaking options are:

Use Watermarking = yes
Add Watermark = yes
Check Watermarks With No Sender = yes
Treat Invalid Watermarks With No Sender as Spam = spam
Check Watermarks To Skip Spam Checks = yes
Watermark Secret = zzzzzzz
Watermark Lifetime = 604800
Watermark Header = X-%org-name%-Watermark:

I have not been able to figure out when exactly this happens but it 
seems to me that messages
are marked as SPAM when they are replies or forwards. (Re: or Fwd in the 
header).
Is there any way to know when the watermarking fires marking a message 
as spam and why?
Any ideas are appreciated.
Thank you.
Andreas Kasenides

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